RE: (ET) E20 lacking power

["Markus Lorch" <mlorch vt edu>]

> You didn't mention if the armature resistors were warm or hot 
> - probably 
> because they weren't, in which case never mind..

They were cold. :)
> 
> On the current measurement - use the shunt already in 
> ... thanks I'll consider doing that

> On the motor shunt getting hot - others have reported bad 
> connections to 
> that shunt. You may want to clean them up.
> 
> Also poor motor performance and large currents is usually associated 
> with a weak (or missing) field. You may want to hook up the voltmeter 
> across the field terminals and check that it's 36V when in 
> cruise mode - 
> actually I guess anything below the field weakening setting 
> should be 36V?.
> 

These are good points. Too low a field could really be the problem and
I haven't measured the field voltage after I fixed the diodes, so I think
this is a good thing to check. 

Thanks

Markus

> 
> SteveS
> E20
> 
> 
> 
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